Cambridge Phase 1-LR 940804 (2) G EOTECHNICAL
E GEE Consultants, Inc.
2540 Glenda lane · Suite 10g · Dallas, lexas 7522~ * {214) 620-9791 * [ax (214) 620-9794
August 4, 1994
Mr. Jack Bommarito
Beamer Development Company
P.O. Box 2312
Coppell, Texas 75019
RE: Project No. B-94-0178
Estates of Cambridge Manor, Phase I
Coppell, Texas
Dear Mr. Bommarito:
In accordance with the request of Mr. Dave Carlton of Dowdy, Anderson and
Associates, a representative of GEE Consultants, Inc. obtained samples of the exposed
material at pavement subgrade level at the above referenced project.
The samples were transported to the laboratory and classification tests were performed.
The test results are as follows:
Sample No. 1
Sample Location: Cambridge Manor Lane, Station 1 +50
Sample Description: Reddish brown sand
Liquid Limit: N/A
Plastic Limit: N/A
Plasticity Index: Non-Plastic
Percent Passing No. 200 Sieve: 54
Beamer Developmeut Company August 4, 1994
Sample No. 2
Sample Location: Cambridge Manor Lane, Station 8+00
Sample Description: Gray shale mixed with brown sandy clay
Liquid Limit: 26
Plastic Limit: 10
Plasticity Index: 16
Percent Passing No. 200 Sieve: 57
Sample No. 3
Sample Location: Cambridge Manor Lane, Station 16+00
Sample Description: Dark gray silty clay with occasional gray
shale fragments
Liquid Limit: 41
Plastic Limit: 15
Plasticity Index: 26
Percent Passing No. 200 Sieve: 79
Sample No. 4
Sample Location: Castle Creek Drive, Station 4+50
Sample Description: Dark gray silty clay
Liquid Limit: 33
Plastic Limit: 14
Plasticity Index: 19
Percent Passing No. 200 Sieve: 88
A lime series test was then performed on material obtained from sample location No.3.
The results of the lime series test are as follows:
Percent Liquid Plasticity
Lime Added Limit Index
0 41 26
4 37 7
6 37 4
8 39 7
GEE Consultants, Inc. Proposal No. B-94-0178
Page
Beamer Developmeat Company August 4, 1994
Based on the above listed test results, we recommend that the subgrade of the proposed
pavement be stabilized with the addition of six percent hydrated lime (approximately 27
pounds of lime per square yard, for a six inch thick stabilized layer). The lime
stabilization should be performed in accordance with the accepted plans and
specifications.
Based on the sandy non-plastic nature of pavement subgrade soils observed and tested on
Cambridge Manor Lane just north of Deforest Road, consideration may be given to
deletion of stabilization in this area.
If you have any questions or if you require further information, please do not hesitate to
contact us.
Sincerely,
GEE Consultants, Inc.
Project Manager
Geotechnical Engineering Division
GGH:RWG/Iej
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cc: ~r. Bill Anderson, Dowdy, Anderson and Associates, Inc. ':'~ '"~
Mr. Larry Davis - City of Coppel]
GEE Comqultants, Inc. Proposal No. B-94-0178
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